There is provided a household appliance including a housing and a cavity arranged within the housing. Further, a ceramic heater capable of uniform resin curing is provided. A section number acquisition unit acquires a number of sections for sectioning the plural image processing units into groups. Each of the signal lines is located between two adjacent power lines. The user can position a specimen or testing sample within the open jaw, and then remove his or her hands to a safe location before activating the grip to grip the specimen.